I'd like to take moment to reflect on the fact that we as a species were able to take our amazing ability to wipe other species off the face of the earth and apply that to a deadly killer that's not even visible with the naked eye. We took a virus and bitch slapped it so hard its (for all practical purposes) extinct.

They actually address this in the Dresden Files (fantastic series, you all should read it). Basically, the main character asks an assassin how he would kill a wizard. His response is simply "Supersonic round from half a mile away. Or plant a car bomb and read about the explosion later".

Plus, sometimes the hunt for them is an adventure on it's own. I recently set out to find all of the lost sectors on Titan, and managed to stumble into Cargo Bay 3, and oh man! That was exciting! If you haven't already, I highly recommend checking it out.